FERTILIZERS AND AGRICULTURAL LIME 7 



Average Variation from Guaranteed Analysis 



Twelve firms have registered five or more brands of mixed fertilizers. On the 

 basis of composition found by analysis as well as of tonnage sold, the following 

 table shows to what extent each manufacturer was successful in avoiding de- 

 ficiencies in plant food guarantees in his mixtures. One of the twelve firms has 

 an average deficiency in one plant food element. 



Manufacturer 



Average Percentage of Plant Food 

 Above or Below the Minimum Guarantee 



Nitrogen 



Available 



Phosphoric 



Acid 



Water 

 Soluble 

 Potash 



American Agricultural Chemical Co 



Apothecaries Hall Co 



Armour Fertilizer Works 



Baugh & Sons Co 



Berkshire Chemical Co 



Consolidated Rendering Co 



Eastern States Farmers' Exchange . . . . 

 International Minerals & Chemical Corporation 

 Old Deerfield Fertilizer Co., Inc. . . . 



Olds & Whipple. Inc 



Rogers & Hubbard Co 



Swift & Company Fertilizer Works . . . . 



+ 

 —.06 



+ 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 



Explanation of Tables of Analyses 



Guarantee. The, plant food guarantee or the grade of each fertilizer is made 

 a part of the trade name under the heading "Name of Manufacturer and Brand", 

 and is expressed as nitrogen, available phosphoric acid, and water soluble potash 

 and in that order. 



Mixtures Substantially Complying with tiie Guarantee. In addition to those 

 fertilizers which meet their guarantees in every respect, this table includes also 

 those mixtures which have one or more elements below the guaranteed percentage 

 but have a shortage of less than $1 per ton. 



From the Control Official's viewpoint, the amount of overrun, within reason- 

 able limits, found in any sample of fertilizer is not especially significant. Of 

 main importance is the fact that the particular sample analyzed shows that the 

 manufacturer of the brand represented by the sample is selling a product which 

 is or is not substantially as guaranteed. The manufacturer whose 4-9-7 brand 

 is found by the Control Official to be running 4.01-9.03-7.02 in every sample of 

 the brand tested is meeting all requirements covering this part of the fertilizer 

 control laws as fully as the manufacturer of another 4-9-7 brand found to run 

 4.85-9.95-7.90 in each sample tested. 



Therefore this table, in addition to the data mentioned In the next paragraph, 

 contains only results of analytical tests pertaining to the average amount of 

 water insoluble nitrogen present In each brand, since this Information is of 

 value to tobacco growers and other users of fertilizers containing a high per- 

 centage of this form of nitrogen. 



Potash Forms. Tests for chlorine are made only on tobacco mixtures and on 

 those fertilizers which carry a guarantee of potash in forms other than muriate. 

 When the amount of chlorine present in any brand exceeds the tolerance allowed 

 for that brand, this fact is indicated by a footnote. 



